Keyboard shortcut error every time I create a snip

I get a error dialog box when I go to use SnipitI'm using the default shortcuts installed with the app. And it doesn't matter if I click the the red button on the one click tab or use the menu item to start a snap. I click the OK button and then It gets me to the snapping cursor and then I can create my screenshot. Anyone have any suggestions about what's causing this? I'm using Dark Mode on Mohave. I haven't been able to find any other apps using this keyboard shortcut yet.

Update: I may have found the issue. After reading other similar posts, I change the Mission control capture shortcut key to shift-control-M and the problem seems to have solved the problem. One suggestion, the "Control + Shift + w" message was incorrect. If I looked at the previous shortcut keys combo it was "Control + Shift + W" so I didn't think there was a conflict.